Thermador Oven Probe Error: Temperature Sensor Disconnected or Failed

Quick Answer

The PROBE error on a Thermador oven is the LCD-era equivalent of F24 - the RTD temperature probe is either disconnected or has failed. On newer Thermador models with full LCD displays, the word PROBE appears; on older control panels the same fault shows as F24. The probe connector behind the oven is the first thing to check - it can pull loose during installation or from vibration. If the connector is seated, test the probe resistance with a multimeter: a working Thermador RTD probe reads 1,080-1,095 ohms at room temperature (68 degrees F), rising to approximately 1,385 ohms at 212 degrees F. A reading of OL (open circuit) or significantly outside this range confirms the probe has failed. Replace with OEM 00486348 ($25-45). Repair success rate is 90%.

ThermadorOvenSeverity: moderate90% DIY Success

Time to Fix

5–20 min

Difficulty

beginner

Parts Cost

$25 – $45

Tools Needed

Multimeter (required for RTD resistance measurement), Phillips screwdriver (probe mounting screw)

What Does the PROBE Code Mean?

The temperature probe is disconnected or has failed. Check the connector behind the oven first. Test resistance (1,080-1,095 ohms at room temp). Replace probe OEM 00486348 if out of range.

Most Likely Causes

Based on aggregated repair data, here is the probability breakdown for this error code:

RTD probe connector pulled loose behind the oven40%

RTD probe element failed (open circuit)24%

Wiring harness between probe and control board damaged22%

Probe mounting screw loose - probe shifted out of position14%

Symptoms You May Notice

PROBE displayed on oven LCD control panel
Oven will not enter preheat
Temperature reading shows dashes or error
Oven shuts off mid-cook with PROBE message
Beeping accompanies the PROBE display

Can you reset a Thermador oven to clear the PROBE code?

After replacing the probe or reseating the connector, turn off the circuit breaker for 60 seconds. Restore power - PROBE should not return if the probe now reads within spec. If PROBE returns immediately after installing a new probe, suspect a wiring harness fault or the control board probe input circuit.

Tools Required for Diagnosis

Multimeter (required for RTD resistance measurement)Phillips screwdriver (probe mounting screw)Flashlight

Diagnostic Checklist

Follow these steps in order. We start with the easiest external fixes before opening up the machine.

Turn off the circuit breaker

Turn off the circuit breaker. Carefully pull the oven 6-12 inches away from the wall or out of the cabinet. Locate the probe connector at the rear of the oven - it is a small 2-wire connector. Unplug it, inspect the pins for corrosion or damage, and firmly reseat it.

If reseating the connector does not clear the PROBE error

Set multimeter to resistance (ohms)

Install the replacement probe (OEM 00486348)

Replacement Parts

If your diagnostic testing proves the component has failed, you will need a replacement. We recommend OEM parts over aftermarket for water-handling components.

Part Name	OEM Number	Estimated Price
RTD temperature probe00486348 · $25–$45	00486348	$25 – $45

Verify part fitment for your Thermador model

Repair vs. Replace Calculator

Appliance Age (Years)7 Yrs

Labor Approach

Our Verdict

REPAIR

Estimated Cost: $35 (Parts) vs $5400 (New Machine)

Frequently Asked Questions

What is the difference between PROBE and F24 on a Thermador oven?

They represent the same fault - failed RTD temperature probe. PROBE displays on newer Thermador models with full LCD screens. F24 displays on older control panels with a numeric display. The diagnosis, part number, and repair procedure are identical for both.

Where is the temperature probe located on a Thermador wall oven?

The probe extends through the rear wall of the oven cavity, usually in the upper-left or upper-right area of the back wall. It is a thin metal rod held in place by a single mounting screw. The wiring connector is accessible from behind the oven.

Can I use the oven with a PROBE error displayed?

No. With no temperature feedback, the control board cannot regulate heat and the oven will refuse to operate. This is a safety feature - without the probe, the oven could potentially overheat dangerously.

Is the RTD probe on a Thermador the same as a thermistor?

No. Thermador uses RTD (Resistance Temperature Detector) probes, which have a different resistance profile than NTC thermistors. An RTD reads around 1,080-1,095 ohms at room temperature. A typical oven thermistor reads 10,000-50,000 ohms at room temperature. Do not swap these components - always order the RTD-type probe specified for your Thermador model.

I replaced the probe but PROBE still shows. What is wrong?

First confirm the new probe connector is fully seated at the rear of the oven. Then verify you installed an RTD probe (not a thermistor) and that the part number is correct for your model. If the connector is seated and the part is correct, the wiring harness between the probe and control board may be damaged, or the board's probe input circuit has failed.

Related Thermador Oven Error Codes

Code: HUBThermador Oven Error Codes: Complete F-Code Reference for Wall Ovens and Ranges Code: F24Thermador Oven F24 Error Code: Temperature Sensor Fault Code: F34Thermador Oven F34 Error Code: Control Board Relay Fault Code: F7Thermador Oven F7 Error Code: Control Board or Door Switch Fault Code: F64Thermador Oven F64 Error Code: Control Board Failure

Same Fix Works on These Brands

Thermador shares the same hardware platform with these brands. The diagnosis and repair steps are identical.

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Models Known to Experience PROBE Errors

This repair applies to most Thermador ovens with this error code. Common model numbers include:

ME302ES, ME272ES, MED272JS, MES301HP, POD301J, POD302W, POD301LW, PRD486WDHU

Last verified for technical accuracy on March 14, 2026